Malicious PDF — malware analysis report

Static analysis result for SHA-256 e34b65a901f17860…

MALICIOUS

PDF

110.9 KB Created: 2020-11-19 12:47:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 2a65e3532fc893981e03880318484d58 SHA-1: 9b25de3ea266c758328196511e933c03dae5a686 SHA-256: e34b65a901f178603ff6f6f93d4e807fff0d9be0bda190c68ada79b2e30d2292
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://trafffe.ru/strik?utm_term=%25D8%25A8%25D9%2588%25D8%25A7%25D8%25A8%25D8%25A9+%25D8%25A3%25D8%25A8%25D8%25A7%25D8%25A1+%25D9%2585%25D8%25AF%25D8%25B1%25D8%25B3%25D8%25A9+%2522%25D9%2587%25D9%2588%25D8%25A8%25D8%25A7%25D8%25AC%2522+%25D8%25A7%25D9%2584%25D8%25AB%25D8%25A7%25D9%2586%25D9%2588%25D9%258A%25D8%25A9 PDF link annotation
    • https://toripifisesu.weebly.com/uploads/1/3/4/3/134367164/6656948.pdfIn PDF document text
    • https://tibiwurab.weebly.com/uploads/1/3/2/6/132695994/5011088.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/petuzutemixuvod/guide_pose_fenetre_pvc_lapeyre.pdfIn PDF document text
    • https://s3.amazonaws.com/lazolu/ginuzawivikuvir.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzamada/spades_card_game_rules.pdfIn PDF document text
    • https://s3.amazonaws.com/nupotukig/nefisimaxupem.pdfIn PDF document text
    • https://s3.amazonaws.com/mokuwanibof/77391168529.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01dfa1fe-16e7-4143-a8d5-56d39d949276/53751115414.pdfIn PDF document text
    • https://s3.amazonaws.com/bejenosugede/identity_theft_protection_stamp_amazon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ba06113-6376-4083-8f15-bcf107855b05/taha_investigacion_de_operaciones_pd.pdfIn PDF document text
    • https://s3.amazonaws.com/novipaliwid/front_range_academy.pdfIn PDF document text
    • https://s3.amazonaws.com/posufij/27029593595.pdfIn PDF document text
    • https://s3.amazonaws.com/rotowan/80650765973.pdfIn PDF document text
    • https://s3.amazonaws.com/jezekemunidup/cafe_racer_mod_apk_1._032.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a66d149e-35ba-4665-94be-49bc09f1ec58/dunel.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00017613.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x17613 32480 bytes
SHA-256: a6181486f8bec1cc77de434853c5461b4ae8d15b0fa8bf8abfd9a4765239909e
font_00_sfnt_off00012ad2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AD2 4120 bytes
SHA-256: 0f754f738a4febb1e656ad53338d205f067f60d81cd98e15de9de3f975fd8a34
font_01_sfnt_off000138e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138E0 10084 bytes
SHA-256: 18f13b45edb14fc4ac07f8ce02bae4a5e62248eec3ce6b7778a07e4a238a6163
font_02_sfnt_off00015a8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A8A 17900 bytes
SHA-256: c5fd0b18ecbf490417ab0a13b36e5dbfe11f418f1b551dfb385f97ab94859b75

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